What is a Bathroom Exhaust Fan Used For? Exclusive Guide

The bathroom exhaust fan is a mechanical ventilation device that uses a flexible tube or a metal duct to exhaust air from the premises to the outside.

Most people believe that the major purpose of a bathroom exhaust fan is to remove odors from the bathroom, but it also plays an important role in keeping the air free of moisture caused by steam released after showering.

The removal of warm, damp air is intended to prevent the growth of mold, mildew, and other microbes. If your bathroom always smells musty, you may consider installing a bathroom exhaust fan and having your home examined to guarantee no mold growth.

How do bathroom fans work?

In the absence of a bathroom fan, your bathroom may encounter excessive moisture buildup, increasing the likelihood of damaged bathroom walls, fixtures, and floors.

The warm, humid air provides an ideal setting for mold and mildew to grow. The high amounts of moisture in the bathroom will cause the walls, paint, and doors in adjacent rooms to deteriorate.

You may want to consider installing a bathroom exhaust fan to avoid all of these problems. A bathroom exhaust fan is powered by a conventional 120-volt household electrical current, just like the rest of the house’s electrical fixtures.

The bathroom may be connected in the same way that other electrical fixtures, such as lighting, are. The bathroom fan is activated in the same way that the bulb switch is, and it may be set to turn off on a timer.

When the fan is turned on, air is pulled out of the bathroom through the fan enclosure and into a plastic hose that leads to the outside. When not in use, a plate is used to cover the duct.

Bathroom exhaust fans vary in size, style, color, and may include a heater, light, and fan all at the same time. Some have gone a step further by including Bluetooth and a speaker capabilities. This allows you to listen to music while taking a shower.

When the fan is turned on, you should be able to hear the sound it makes. It should not be too loud, as a noisy fan could be distracting. Choose one with a sound rating of 1.0 sones or less to have a quiet time in the bathroom, allowing you to relax.

Recommended Best Bathroom Exhaust Fan with Light & Heater.


You should be able to make the most critical decision by ensuring the fan will be able to work efficiently for your bathroom. The exhaust fan capacity is measured in CFM (cubic fit per minute) which translates to the volume of air moved in a minute by the fan.

The bigger the capacity of the fan, the better the exhaust fan’s ability to clear the humid air. You should be able to select a bathroom exhaust fan that will work efficiently in your bathroom based on the size of the bathroom and the number of people that will use it.

Note that the exhaust fan could at times be too strong for the bathroom creating a negative pressure in the bathroom. This is most likely to interrupt the functioning of the furnace from time to time by taking out the cold air through the window and not the bathroom.

It is therefore, crucial to go for the right size of the bathroom exhaust fan so you can enjoy it fully. These are the measurements to go with when considering purchasing a bathroom exhaust fan.

  • Not beyond 50 square feet: 50 CFM
  • Beyond 50 square feet: 1 CFM per square foot

The HVI (home ventilation institute) conducts independent tests on bathroom fans and certifies them when they match industry standards.

Fans that are certified by the HVI give you the guarantee to perform as they state, that is when they are picked with the recommended size and when installed correctly.

Installation Hacks

Have your bathroom exhaust fan in areas known to be most moist in the bathroom; this may be near the shower or over the sink.

In a bathroom, with an open plan, you may opt to position the fan in the middle between the toilet and the shower. For the small-sized bathroom placing the fan in the middle of the room would be a great idea.

Be sure that the exterior vent louver is operational and shuts fully when the exhaust fan is not in use. This will prevent the cold air from getting into the house when the exhaust fan is not operational.

Protect the metal duct or flexible hose that connects the fan housing to the exterior. This will result in a transfer of indoor heat to the exterior.

The seal cap beneath the bathroom door should at no time be sealed tightly. A gap of ¾ inch should be left to allow for the replacement of the air exhausted by the exhaust fan.

In cases where the ceiling is high up to 9 feet, you will need to consider an exhaust fan with a higher capacity.

Are bathroom exhaust fans necessary?

All bathrooms ought to have a bathroom exhaust fan. The steam created after taking a shower turns into moisture and gathers on the walls of the bathroom.

Moisture is likely to seep into the wall through minor cracks, wreaking havoc in your bathroom. Mold and mildew will begin to grow when the tiles begin to fall off the wall.

It is, therefore, necessary to have a bathroom fan to maintain your bathroom in good condition and clean.

When is the best time to use a bathroom exhaust fan?

The moment you let the water run in your shower, should be the very moment you have the bathroom fan switched on.

You will be able to adjust the humidity levels in your home as a result of this. Never, ever leave the bathroom fan running throughout the day or night. Because the ball bearings within are prone to lock up, overheating may occur, perhaps resulting in a fire.

You could install a timer on the bathroom fan if you are likely to forget it on and have it set for 15 minutes. This will be enough time to ensure all moisture is cleared off.

How long should one run a bathroom exhaust fan?

Moisture is very harmful in the house and would lead to several problems if it is not controlled.

The level of humidity in your bathroom will see the amount of moisture in the air increase, and Moisture could sip into drywalls thus creating fungal growth in the places you won’t be able to spot it.

Being exposed to mold for long could lead to coughing, allergies, and skin irritation. Excess moisture in the air is generally harmful with the dampness encouraging bacterial growth and other microorganisms.

The simple act of switching on your bathroom fan will see you avoiding all the problems stated above. You are advised to turn on the fan every time you run the water and leave it on for another 20 minutes once you are out of the shower.

The fan should also be cleaned at least once a year to improve its efficiency and durability.

Which Fan Brand is the best & durable when it comes to the Exhaust fan?

Have you decided to have a fan in your bathroom or have the last one replaced? Let it not be of worry to you, we have listed some of the factors that you should have in mind when picking one for your bathroom.
1. Performance, this is concerning the capacity of the fan. Will it work effectively depending on the size of your bathroom
2. Noise Sensitivity. A good fan should not be too noisy when operational. The noise tends to be a nuisance when relaxing
3. Motor Selection. The motor board of the fan should be durable. Go for the permanently lubricated motor which will need less maintenance
5. The Price should be budget-friendly and you should be able to get value for your money. The exhaust fan should be able to run effectively and efficiently all through.


FAQS

Does a bathroom fan aid with smell?

The bathroom exhaust fan main purpose is to assist you in getting rid of humidity left in the air after showering.

Another role it does is to get rid of odors. An unpleasant smell in the bathroom would be easily drawn out of the bathroom with the help of the exhaust fan.

This will, in turn, improve the ventilation system allowing the bathroom to remain clean, with a clear atmosphere.

Should one run the bathroom fan while showering?

Every time you let water run, you should turn on your bathroom fan. The fan will allow you to get rid of humidity in the bathroom and the unpleasant smell more easily.

A bathroom with no ventilation is likely to have a bad smell if the bathroom fan is not set right.

The bathroom fan should be left to run for another 15 to 20 minutes to make sure all the humidity is gotten rid of in the bathroom and also the ventilation duct. This will leave the bathroom clean and odorless.

What is the difference between exhaust and a ventilation fan?

The difference between a ventilation fan and an exhaust fan is the appearance with the exhaust fan most being iron-based material, while the ventilation fans are made of plastic materials.

The value of each is not based on the material despite the fact that most exhaust fans are expensive.

There are industrial exhaust fans that cannot be used at home due to their capacity. They consume a lot of power and are in general expensive.

The small-sized exhaust fan could be used at home in the kitchen to get rid of dirty gas and the price is not as expansive as the industrial exhaust fan.

The exhaust fan is mounted on the ceiling or the wall. The current exhaust fan can simply play the role of the ventilation fan, but the ventilation fan cannot play the role of an exhaust fan.

How long should one run a bathroom fan after a shower?

This is a question that bothers many all with the need to fully get rid of humidity in the bathroom.

In accordance with the electrical procedures, they stipulate that a fan should be left running for about 20minutes after a shower. This will work perfectly by ensuring all humidity is gotten rid of in the bathroom and the ventilation ductwork.

Some people do not have the time to wait for humidity to be cleared before leaving, for this matter you may opt for a fan switch with a timer and the fan would shut itself off. The bottom line is 15 to 20 minutes is enough time to ensure all humidity is cleared.

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